Dynamic characteristics of elastically supported beam subjected to a compressive axial force and a moving load

Abstract

  This paper discusses the dynamic characteristics  of an elastically supported Euler-Bernoulli beam subjected to an initially loaded compressive force and a moving point
 load. The eccentricity of the axial force is taken into consideration. The time-histories for  beam deflection and the dynamic magnification factors are computed by using
 the Galerkin finite element method and the implicit Newmark method. The effects of decelerated and  accelerated motions on the dynamic characteristics are also examined.
 The influence of the axial force, eccentricity and the moving load parameters on the dynamic characteristics of the beams is  investigated and highlighted.
Keywords: Elastically supported beam, axial force, moving load, Newmark method, dynamic factor.